Dipper-tooth.



J. G. SKELTON.

DIPPEB TOOTH.

. APPLICATION FILED FEB. 23, 1911. 1,903,663,, Patented Sept. 19, 1911. 7

2 SHEETS-SHEET l.

I ATTORW J. G. SKELTON.

DIPPER TOOTH.

' APPLICATION FILED FEB. 23, 19l1. 1393,6636 13116111611 Sept. 19,1911.

2 SHEETS-SHEET 2.

WITNESSES INVENTOH 1 fiwfl I l 51' MN 7470*M h zm I ATTORNEYS JOHN GIFFORD SKELTON, F BROWK STATION, NEW

DIPPER-TOQTH.

Specification of Letters Patent. P t ted sl t 1'9"1911.

Application filed February 23, 1911. Serial No. 610,229.

To aZZ wh0m it may concern: Be it known that I, Join? Grrronn SKEL- TON, a citizen of the United States, and a resident of Brown Station, in the county of Ulster and State of New York, have invented certain new and useful Improvements in Dlpper-Teet-h, of which the following is a Specification, such as will enable others skilled-in the art to which it appertains to make and use the same;

This invention relates to dipper teeth suchas are ordinarily used in connection with steam shovels, dredges and other excavatmg machinery. The shovels, dippers or buckets of such apparatus are usually armed, at the loading end, with a plurality of mtallic tetlnfwhich not only act as a means of? cuttihg into the earth or the materi'al'to be excavated, but also serve to protect frontwear. the. lipor biting edge of the shovel, dipper or bucket. The points of the dipper teeth generally used at the presout time, become dulled after slight use, and it-"tlie'n becomes necessary to discard the old tooth and suhiti'tute' a new one, or to sharpen the same by heating and hammer ing, which I have found in practice cannot be done more than once, for being made of very hard stee1,'the heat to which they must be'subjected in operation of sharpening injures the temper of the metal to such an extent as to make them unfit for the hard usage to which the'y must be subjected, the result of which is that, while the original.

cost'fof such" teeth is quite high, the length of time they can be used is very short.

The object of my invention is to provide a tooth for dippers, buckets, scoops of steam shovelsand other excavating machinery, of

ing a new cutting edge on reversal, and

when the point is entirely worn away, a new point may be substituted without discarding the part which holds the point.

A further object of my invention is -'to provide means on the point and holding arm of the tooth whereby the use of bolts projected. through the working faces of the point is. avoided. The, removal of such or webs F forming said-recess,

bolts, I have found in ire sultsli'nmuch loss of time, whichit-is one of the ob- I jects of my invention to avoid: y, v

A further ob ect of; 'niy tinventionfiis to provide ,fastenlng means on the-side oft-he tooth which is subject to comparatively no,

weaiy'one' form of which means is so arranged as to secure the point "to'thec-holding portion of the tooth in a manner substan tially automatic. i

' Further objects such'a's simplicity,;'dura-,

bility and utmostlimit. of use of the entire teeth will appear from'thefollowing description in connection with the, accompanying drawings, in which-' Figure 1 is a perspective view, in part broken away, and with the automatic 'fastoningmeans removed.- Figk 2- is a sectional view on the line 2 2 of Fig, 3, showing the tooth attached tea portion of a dipper; Fig. .3 is a plan-view Fig. lls a vertical, longitudinal section on line4-t, .of Fig. 2; Fig. 5 is an enlarged-detaiL of the self acting fastening means; I

Referring to-the construction illustrated,

A and 13, indicate, respectively, portions of two sides of a dipper, bucketorother similar vesselused 1n e'Xcavatmgor-dredging operations, the forward edge of the side E having attached thereto. one of my improved teeth. 1

The tooth comprises twomembers, the cutting member C and theshank or holding member D, and both maybe-formed of any suitable metal capable of being properly tempered, such, for example, asmanganesef steel. The cutting member -,G';is of wedgelike form and tapers to a-xmorezol less, thin cutting edge at its forward end. is further formed with two rearwardly extending jaws, E, E, each of WhlclfrlS provided centrally with a tongue E and; on,both sides of the tongue the jaw is' rabbeted z t 4E? to fit and receive corresponding- .greoves and tongues on the holding-arm. "-;.'l-he,cut-ting member C is vformed in one ,i'nte'graltpiece and .is provided at its centrallportion with an inn'er recess F, the purpose of WhlChzWlll be hereinafter referred to, and;the s ide-wal ls' b ng P fastening means to secure the parts together, said holding member being provided at its forward end with a longitudinally extendmg slot G into which the edge of the side B of the dipper is fitted. The holding member D is wedge-shaped at its forward; end to form a nose H,-and has a rearwardly'f that-the forward end of the nose fits snugly into the recess Ffof thecutting member C and the wall M of said rabbet meets flush with the rear edge of the inclosing wall F of the cutting member C.

The upper and lower sides of the nose II of the holding member'D and the jaws E, E. ofthe cutting member are so formed that they fit each other snugly, and are so shaped relative to each other that when the cutting member C is reversed so that the jaw E will-lieinthe position shown in Fig. 1 as occupied 'b'ythe jaw E, and the angle of directionot" member G will not-be changed.

- Extending through an opening N in the nose H of the holding member D is provided a spring 1 -bolt carrier It, the rear portions arms being provided WltldyliLiZQI'fii the respective ends of which are connected to ears 0, O on the fastenenai'nis-P,-I, each of which is provided atits forward end with a short bolt Q formed integrally with or SECYRQd to a 13f said jee- - tions S which act asa bea ringtor said :ms

of'the spring N y of the cut-tingmember C and extend into the opening N of thenose when the spring is extended. "The bolts Q, when in operative position under the action lie within the opening F of said nose H being countersunk so that the b'olt'carrie'rs and the arms will lie flush with g the said surfaces.

In the use of excavatingshovels surface marked 1"in- Fig. 1 and the surface opposite thereto take the brunt of the Wear and the greatestforce exerted is against those points;

therefore, I haveprovidedv suitable locking means at those points for holding the cutting member to the holding member T 'ment relative to each other" and-no stronger and preventing lateral and transverse'moveholding means at the sides of these. members is necessary.

In operation the dipper as shown in Fi as dipper motion approximately following a circle as indicated by the-arrow in Fig. 2, the Wear of the'extreme pointof t-he' tooth H, the outer surfaces dipper teeth'. occupy a position relativeto' the cutting'side of the the are. of

will be downwardly and outwardly the result being that the-point will be worn away at ab-c until it takes the form of the line bc. Thereupon, the position ofv the tooth may be reversed with the point, indicated at 7) uppermost and then the wear will be on i the lines bc Z, and so the point' ;inay be.

repeatedly reversed until the entire" cutting portion of the member C is worn away.

The means of attachment which I have provided enables the ready removal of old cutting points and the insertion of new ones, all that is necessary for the operator to do being to press apart the bolt-carriers It against the action of the spring N, when the old tooth can be removed and a new one slipped into place.

If it is desired to use my tooth without the automatic fastening means the cutting member and holding member can be securely fastened together by means of a bolt passed through the openings F and F in which case the bolt will occupy such a position on the tooth as to be subject to very littl wear and maybe very readily removed I wish it to be understood that I do not confine myself to the precise details of: construction and arrangement of the invention herein set forth, as modification and variation may be made without departing from the spirit of the invention, defined by the appended claims.

\Vhat I claim is:

1. A dipper tooth, comprising a holding member, jaws on said holding member for receiving and holding the lip of the dipper, a cutting member having rearwardly extending jaws interlockingwith the jaws of the holding member and fastening means on the sides of the holding member and. cutting member for preventing longitudinal movement relative to each other.

A dipper tooth, comprising a holding memberv jaws on said holding member for receiving and holding the lip of the dipper, a reversible cutting member having rearwardly extending jaws, tongue-and-g-roove interlocking means on said jaws for preventing lateral movement of said members longitudinal movement relative -to' each other; v i I 3.'A dipper tooth,'co'mprising a holding member, jaws on said holding member for receiving and holding the lip of the dipper, a, cutting member having'rearwardly extendin "jaws interlocking with the jaws of the, ho ding member, and a self-closingfas. tene'r for securing said members against longitudinal movement.

4, Andipper tooth, comprising a holding member orm'ed with'upper and lower aws to receive-the lip of the dipper, a cutting member having rearwardl-y extending jaws andfastening means on the sides of the holding .member andcutting member 'for preventing i-"iijterlocking with the .jaWsfof the holding ember and a spring-pressed -means for Bedding-said members together.

5. A dipper tooth, comprising a holding gmember recessed to receive the edge of the 'fir; ff reversible cutting member having i 11d; wrlls -gforming wWedge-s'heped recess and provided iriwlithperpendiculiim edges,

Wedge-shaped nose on the holdingmember adapted to fit said recess in' the cutting member and perpendicularly rabbeted at opposite sides to abut the'edges of said walls, and

amember having portions projecting horizontally into said Walls and nose for securing said holding and cutting members against relativelongitudinal movement.

JOHN "GIFFORD SKELTON. WVitnesse's:

LITTLETQN FITZGERALD, Jr., E. M. GATHRIGHT. 

